JP2585453B2 - Work lever operation lever mounting structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation lever mounting structure for a working vehicle such as a backhoe or a tractor. Specifically, an operation lever is provided at a lateral position of the driver's seat, and the operation lever is configured to be movable between a steering position protruding into a passage for getting on and off the seat and a getting-off position retracted from the passage. The present invention also relates to an operation lever mounting structure for a working vehicle provided with a lock lever for locking and maintaining the operation lever in the two positions.

[Conventional technology]

In this type of operation lever mounting structure for a working vehicle, as shown in FIG. 6, a support tower (14) having an operation lever (12) at an upper portion and a horizontal axis (P) at a lower portion thereof are conventionally provided. The operation lever (12) can be moved to a steering position in which the operation lever (12) protrudes into a passage for getting in and out of the seat (11) and a getting-in / out position retracted from the passage by being provided so as to freely swing back and forth. And a lock lever for locking and maintaining the operation lever in the two positions.

That is, the engaging recess (18) of the lock lever (15) pivotally attached to the support tower (14) at the horizontal axis (Q) is engaged with the lock levers (20) and (21) on the swivel (1) side. The support tower (14) is steered (by the imaginary line in Fig. 6).
And the boarding / alighting posture (the state shown by the solid line in FIG. 6).

In other words, when operating the work vehicle while sitting on the seat (11), it is easy to manually operate the operation lever (12), and
The support tower (14) is tilted forward so as to close the passage (S), so that an unexpected fall of the operator from the passage (S) can be restrained. The support tower (14) was used in such a way that the support tower (14) was swung to get on and off so as not to be disturbed.

[Problems to be solved by the invention]

However, according to the prior art, the lock lever (15) extends forward from the support tower (14), and
The lock lever (15) and the lock tower (15) are arranged so as to protrude forward more than the swing movement for disengagement, and are integrally moved with the support tower. The lock bar (15) which slightly protruded toward the passage (S) even when the support tower (14) was in the getting on / off position, although the blocking function was added.
And it is difficult to get on and off unexpectedly, and when the steering posture is set, the lock lever (15) does not protrude enough and the passage (S) is hard to be sufficiently closed. There was room for improvement in each of the attitudes.

 An object of the present invention is to eliminate the above disadvantages.

[Means for solving the problem]

In order to achieve the above object, the present invention provides the operation lever mounting structure for a working vehicle described at the beginning, wherein the lock lever is provided in a state where the lock lever is moved in the same direction as the operation lever at a portion where the operation lever is provided, When the operation lever is in the control position, the lock lever is operable to lock in a state where the lock lever is protruded from the operation lever in the direction protruding into the passage, and when the operation lever is in the getting-in / out position, the lock lever is Are arranged so as to be capable of performing a lock operation in a state in which they are brought close to the operation lever.

[Action]

According to the above-described configuration, (a) if the operating lever is in a steering posture in which the operating lever is protruded into the passage, the lock lever protrudes greatly into the passage, and both levers sufficiently close the passage. ) In the getting on / off posture, the lock lever is close to the operating lever, so that the passage is sufficiently opened, so that it is easy to get on and off.

〔The invention's effect〕

Therefore, the effect of (a) can prevent an accidental fall of the operator from the getting-on / off passage while the work vehicle is operating, thereby improving the safety. Thus, it is possible to provide an operation lever mounting structure for a working vehicle, which solves the conventional problems.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 shows a backhoe which is an example of the work vehicle according to the present invention. This backhoe mounts a swivel (1) on a traveling body so as to be swivelable all around a vertical axis,
An excavating work device (2) is attached to the swivel (1), and an operating unit (3) is arranged at an upper portion.

The excavating work device (2) is mounted so as to be freely swingable through a swing bracket (4) and is swingably driven by three hydraulic cylinders (5), (6) and (7). (8), an arm (9), and a basket (10). The driving operation of the excavating device (2) and the swivel table (1) is performed by operating levers ( The operation is performed by controlling a hydraulic control valve (not shown) by the operation of 12).

Next, the mounting member structure of the operation lever (12) will be described.

As shown in FIGS. 1 and 2, the operating lever (12)
Is supported by a lever support member (13) so as to be swingable around a front-rearward axis and a left-right axis, that is, freely crosswise, and the lever support member (13) is provided at a lower end front portion. A support tower (1) that can swing back and forth around the horizontal axis (P)
It is attached to the upper end of 4).

Then, by swinging the support tower (14) back and forth, the operating lever (12) is brought into a maneuvering posture in which the operating lever (12) is projected into a passage for getting on and off the seat (11), and a getting-in / out posture retracted from the passage. A lock lever (15) is provided so as to be movable and to lock and maintain the operation lever (12) in the two positions.

The lock lever (15) is pivotally mounted on the inner rear portion of the support tower (14) having a quadrangular cylindrical cross section with a horizontal axis (Q), and bypasses the side wall of the support tower to reach the front wall (16). Also extends to a position slightly forward of the support tower. A downwardly open engaging recess (18) is formed at the root of the lock lever (15) inside the support tower (14), and a laterally extending bracket (19) on the swivel (1) side is formed. The first bar (20) and the second bar (21) are fixed, and the separation distance (L1) from the pivot axis (P) of the support tower (14) to the first bar (20) is the It is set smaller than that of the two bars (21) (L2).

To explain the function, in order to tilt the support tower (14) forward and hold it in the steering posture (the state of the imaginary line in FIG. 1), the engagement recess (18) of the lock lever (15) is required. ) Appears in a locked state engaged with the first bar (20), and at this time, the lock lever (15) is in a state of protruding greatly into the passage (S). Then, the support tower (14) is tilted rearward to be in the getting on / off position, and in this state, in order to maintain the locking state, the engagement concave portion (18) is engaged with the second bar (21) in the locked state (FIG. 1). At this time, the lock lever (15) is moved to the minimum swing movement required to release the engagement between the engagement recess (18) and the second bar (21). Only a minute away from the front wall (16) of the support tower (14). That is, it is in a state of being close to the support tower (14).

(Another embodiment)

As shown in FIG. 4, the grip portion (15a) at the tip of the lock lever (15) is shifted to the side of the support tower (14), and is bent toward the rear side to form a bent position. The grip (15a) is connected to the front wall (1) of the support tower (14).
6) It may be configured so as to be closer to the rear than in 6) to further improve getting on and off.

In addition, as shown in FIG. 5, the support tower (14) can be moved in parallel back and forth along the guide rail (22).
Turn the engaging piece (23) at the lower end of the lock lever (15) into the swivel (1).
The support tower (14) may be locked and maintained in the steering position and the getting on / off position by engaging the first concave portion (24) and the second concave portion (25) on the side. In this case, the relative position of the lock lever (15) with respect to the support tower (14) in both postures is changed by providing the first concave portion (24) at a lower position than the second concave portion (25).

Incidentally, a sign is written in the negative of the claims for convenience of comparison with the drawings, but the present invention is not limited to the structure of the attached drawings by the entry.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of an operation lever mounting structure for a working vehicle according to the present invention, FIG. 1 is a side view showing the structure, FIG. 2 is an enlarged side view showing a base structure of a lock lever, and FIG. 4 and 5 are side views showing another embodiment of the operation lever mounting structure, and FIG. 6 is a side view showing a conventional example. (11)… Driver seat, (12)… Operation lever, (15)…
... lock lever, (S) ... passage

Claims (1)

(57) [Claims] An operating lever (12) is provided at a lateral position of a driver's seat (11), and the operating lever (12) is moved to the seat (1).
The control lever (12) is configured to be movable between a maneuvering position protruding into the passage (S) for getting on and off with respect to 1) and a getting on / off position retracted from the passage (S). An operation lever mounting structure for a working vehicle provided with a lock lever (15) for maintaining a stop, wherein the lock lever (15) is connected to the operation lever (12) at a position where the operation lever (12) is provided. The lock lever (15) is provided so as to move in the same direction, and when the operation lever (12) is in a steering posture, the lock lever (15) is moved to the operation lever (12).
When the operation lever (12) is in the getting on / off position, the lock lever (15) is connected to the operation lever (12) when the operation lever (12) is in the getting on / off position. An operating lever mounting structure for a work vehicle, which is configured to be able to lock each other in a state of being close to each other.